Reinforced concrete construction.



D. B. LUTEN. y REINFOEED CONCRETE CONSTRUCTION.`

A .PPLIoATIoN FILED 00T. 1, 190e.

Patented Aug. 1, 1911.

' i breakuge'- in-all'f'direetions' in emmer-ATE narnn n. Loren, or InmNA'roLrs', I NDrANa.

soa-eea.

. 1 nEINFoRcnn CONCRETE cNs'reUc'rIoNf Spe'iiifleatin of Letters Patent. .ateflied Aug. 1, 1911:

original appuauoh aieginy 1v, 1902, swarm. 107,812. nmdea'ami'apxiicguon nieu my za, 1901-1;

. j Serial No. 217,767, v'Divided' and this-application led October HT? all wwm 'dnnag/.concemf Beit known .that I, .DANIEL B. LUTEN, a citizen of the'United States,'-residing at Indianapolis, lin the county of Marion-and 5 'State'of Indiana,l have tinvented neivand uscfulffmprovements in Reinforced `Concrete'Construction, of which tl1e'.following isi a -ful1,"clea'r', concise, and exact descrip.-

tiori, reference being hadto the accompanying drawing, forming a part of this specilication.

This .invention relates t improvements' inreinforced concrete-4 construction, part-icm,

.larly of'arches, Wallsbcolumns, beams and the li-ke; my invention being more particularly, although not exclusively, designedjorY 'such' members when used-- as; parts oi bridges, sewers, buildings, etc., .which are commonly constructedof concrete, cement, mortar and other materials, and the'inyen ticn has-for its generallobject .to"'provide an.

improvedl construction .of-fthe members above mentioned, characteried by greater strength anddurability and capacity to re-.

.sist the. various strains to which they may be `subjected in any and all directions, to--- gether with greater economy with respect to cost of materials and.construction' as compared with similar structures-at present in use.

To these- :indothe'r ends my invention consists in. general in an arch, wall, column or ,.liearn. structure having incorporatedl therein tension or. reinforcing members anehoredxin the concreteycement,l mortar or othe1 ;material used in thestructure and so" dispsed as to bondthe structure-against which it 'may be 'subjected to strains` 40 The presentapplication constitutes a dif v-isionof an application iiled'by me on the 23rd day of July 1905i, -Serialllo.. '217,767, which is a division. 'of an application .iled

by me on May 17, 1902, Serial No. 107,812.

45. -To anchor a steel bar or like tension member in concrete, etc., what is desired is a" ,gradual tangential' curving of -the bar or other tension member, not sharp enough to crush the concrete under heavy tension, and

'50 the extension of said bar or other tension member far enough into the mass of theconcrete, etc., to securely anchor the rod orother tension member by.adhes ion Aor -frlction; and Jsince the' tension decreasesas'the ^10d extends into the' anchorage, the radius Referring Ito "Figures'l and 2li show a wall or. analogous .ous member.

1,- 1906. '.Klalal N0. 333,832.

ofthe curve of the. anchoring extension" Vmay be decreased withoutdanger-ofcrushing the concrete; resulting in aspiralcui've in'most instances, though in some- .cases .wherethe space limited incertain 'direc-A 6'0 tions, the rod'may be turned back, assuming the form of a curve of contrary exure.- In the "accompanying drawings are illus- 'tinted-structural members. wherein horizontal, lengthwise, and widthwisc; bonding 0I 61S the concrete, etc.,'inthe members is secured by bending the end portions of the tensio'n members and uniting them'to one orgmorc adjacent companion members aslby hooking or looping them around the latt er-'instea of employing separate transverse bonding nlembersl' v I thefaccomnanying drillingsr structural memberV with embedded tension" rods which are; 'oinedor'spliced by :weavingk them across an, hooliin 'them to or near-a companion rod more or less closely posi-1 tioned relatively theretdf A a' -In Fig. l, 8 may 'designate a wall having. 80 embedded therein near one-jface, a series'of 'downwardly and inwardly extending rods 9 `and near the op osite `face .a corresponding -series of upwar ly 'n nd inwardly .extending rods 10. The meeting ends 'of these rods are 85 hooked over- -each-other as shown at 11, and vtheir end #portions maybe extendedmore o r less beyond theirpoints of intersection andanchored' in thematerial of the wall ete., i prefer'ably as shown, ending in a tangential 90. curve-of increasing curvature, as shown at l2, and-fn any case the 'curve may take the 4 form of one of thecontra .'flexure, as atV -12 It 'is to be noted that with tli end'por- -tions of tension rods 9"and 10 arran edas '95 just mentioned, they become bonding evices toeanehor thetwo ro'ds into -one`.`continu- Eig. 2 of. the drahvings illustratesgnodifcations of the bonding features-.hereinbe'- 10@ fore' described, wherein. the horizontal, lengthwise, or 'Widtliwisje bonding. effect is secured in a varietyio forms. .As-shown,

theupper and lower series'of tension rods 9' and `10 not only-interloop with their respec- '105 .tive companion 4rods -in .the same Iver-tical plane, but at their meeting ends are' carried in opposite d1rections, the .distance of one, two or more rods, as shown at .13`, 14 and 15,

respectively, and 'are hooked'around or near '11,0'

to the vertical portions of oppositely extend- 4. A tension memberl anchored in liar.-V

ing rods. v clened plastic material by a substantially y VFrom the foregoing'descriptionit will be tangential curve of decreasing.)r radius in- `seeiithat though .the improvements herein closing another tension member/ described ma1 be simple in character, they 5. he combination with a member of will Vbe thoroughly efficient in securing the hardened plastic materialV of a substantially objects desigi'ied; and while other forms and straight-tension member having an anchor other methods all Within the spirit of the tip consisting o' a spiral substantially tan- -.inventioii are`apparent,' those described are I gential to the tension meiiiber, and ein-A deemed suflieient :ter purposes of illustrabedded in the hardened plastic material. tion. n A 6. The combination with' a 'member of`40- Having` thus; described iiiyiniention'what, hardened plastic4 material; :of-a tension claim as new and desire'to secure by Letmember hai-'ing an anchor tip comprisine ters Patent is: a' spiral of increasin0 curvature substanv 1. A structural member o'iiliardeiied plas; tially tangential to the tensionmember and tic material with tu-otension members einembedded in the hardened plastic material. bedded, provided -with overlapping curved Tlie combination `with a member of extensions s bstantially .tangential to the hardened plastic material, of a tension .niembers, the curves of said extensions be` nieinbei having. an anchor tip consisting of ing'of'decreasingaT radii. a cuiie of contrary i'ienure substantiall 2. ension members embcddediii hartangential to the tension member and ein- 5C 'lened plastic material and bonded bv overedded in the hardened plastic material.

f tension lapping spiral extensions geutial to the members. y

3. A tensionm mber bonded to 'another member by interlocki g spiral curves substantiallyv tangential to the mem- .nd both embedded in hardened plastic ia A substantially 4tai-nn witness whereof, I have'hereunto subscribed iny' name in the presence of two wit-` nesses.

- DANIEL B. LUTEN. llitnesses:

lV. L. LU'i'nN, C. H. KNIGHT. 

